Taping machine for the manufacture of corrugated boxes



March 17, 1942. A. J. GOLDSMITH 2,276,958

TAPING MACHINE FOR THE MANUFACTURE OF CORRUGATED B OXES Filed May 5,1940 INVENTOR aowsMlrfl %n ALBERT J.

v HUUU Patented Mar. 17, 1942 TAPING MACHINE FOR THE MANUFACTURE OFCORRUGATED BOXES Albert J. Goldsmith, Kew Gardens, N. Y.

Application May 3, 1940, Serial No. 333,198

1 Claim.

The invention relates to a taping process and means for carrying outsaid process for use in connection with the manufacture of corrugatedboxes.

Heretofore, gummed tape had been prepared in rolls, the gum or adhesivethereof being in a dry state was moistened by passing the tape over awater carrying roll. The tape was then cut off and applied or pressedunto the article, such as a paper corrugated box or similar product.Among the disadvantages resulting from utilizing an already finishedadhesive tape from a roll may be mentioned the effect of weatherconditions on the adhesive in making the same sticky and causing thelayers of the rolls to adhere to each other, thus preventing aneificient use of the gummed tape in ordinary tape-machines; the effectof low temperature upon the adhesive which interferes with the readydissolving of the adhesive with water, thereby preventing the tape frombeing adhesively united with the article and later coming off thelatter. Furthermore, the conventional adhesive tape roll could not beemployed for all desired purposes since the adhesive would not alwaysfunction for the purpose intended, namely, to provide intimate adhesiveor bond between the tape and the article because of the nature of thematerial from which the article is made.

The above-mentioned and other disadvantages are overcome by the presentinvention which makes provision for ungummed tape being passed over agumming roll carrying warm and dissolved gum or adhesive, whereby thesaid adhesive is applied to the tape passed immediately to the articlebeing worked upon. By this process,

a very high bond of adhesion is gained because the adhesive preferablyselected in accordance with the nature of the material of said article,is fully dissolved and may be still warm, while the adhesive is beingapplied to said tape and said article. Consequently, the weatherconditions have no influence on this process of taping.

By employing the taping process according to the invention any kind ofgum or combining glue may be used, while in the heretofore known tapingprocess a relatively expensive and high test gum had to be utilized.Furthermore, in the heretofore used process it was necessary to changethe consistency or viscosity of the ad hesive for the different seasonsin the year. Through the process employed in accordance to thisinvention production may be speeded up, difficulties regarding therapidity and quality of are eliminated and manufacturing cost of. thefinished article is reduced considerably because of the economy insaving of adhesive and avoiding the use of auxiliary devices for dryingthe gummed tape and for moistening said gummed tape when making readythe same for use.

It is, therefore, an object of the present invention to provide meansfor preparing a tape, coming from a roll of tape with an adhesive in aviscous state just prior to the application of said tape to the articleto be bound or reinforced by the latter.

It is another object of the invention to provide means for conductingsaid adhesive to the tape prior to the latter being applied to thearticle to be equipped therewith.

It is a further object of the present invention to provide a glutinousbinding layer intimately uniting the said tape with the article to-beworked on without the necessity of premoistening the adhesive carried bythe tape before its application.

It is still another object of the present invention to apply an adhesivecarrying tape. to an article while the adhesive is in a substantiallwarm glutinous condition.

These and other objects and advantages'of the invention will appear fromthe following disclosure thereof together with the attached drawingwhich illustrate a certain form of embodiment thereof. This form isshown for the purpose of illustrating the invention since the same hasbeen found in practice to give satisfactory and reliable results,although it is to be understood that the various parts of which theinvention consists, can be variously arranged and organized and that theinvention is not limited to the precise arrangement and organization ofthe instrumentalities as herein shown and described.

In the drawing:

Fig. 1 is a schematic arrangement in longitudinal section embodying theinvention.

Fig. 2 is a top plan view of an article'made in accordance with theinvention.

Referring now to the drawing which shows schematically and inlongitudinal section an arrangement embodying the invention, there isprovided a mandrel l0 upon which is mounted a roll II of ungummed tapeI2. The ungu-mmed tape is preferably passed between two pull rollers l3,M which also guide the tape l2. The tape is trained over an idler rollerl5 and then held against gumming roller it of the gumming stickingeffect irrespective of weather conditions device I! by means of twopressure rollers I8,

I9 mounted on an arm 20 pivoted at 2I to a fixed support (not shown).Arm 20 has an extension 22 against which sufficient pressure is appliedto cause rollers I8, I9 to bear against tape I2 at its location onroller I 6. Arm 20 is further provided with a lifting roller 23 at itsforward end to selectively engage and lift the tape I2 from roller I6into the dot and dash position indicated by numeral 24, when desired. Asmoothing roller 25 is provided beyond gumming device I "I and overwhich passes tape I2 after it has been applied with the gum or similaradhesive, to smooth out uniformly the adhesiv on the underside of thetape. The tape further passes between two pull rollers 26, 21 andbetween the blades or knife means 28, 29 of a cutting device (not shown)and then between the pressure rollers 30, 3| over which are trained thebands 32, 33, respectively.

The gum or other adhesive 40 in viscous or liquid form is contained in apan 4| into which projects roller 42. Between roller 42 and gummingroller IB and in contact with both said rollers is located theintermediate roller 43. The adhesive material 40 is transferred from panM to roller I6 through said rollers 42 and 43 in a well-known manner.The adhesive 40 is supplied to pan 4I through conduit 44 connecting witha secondary mixer 45. Above said mixer 45 is located the prime mixer 46connecting with said mixer 45 through conduit 41. Mixer 45 and 46 are ofconventional construction. Mixer 46 mixes the dry gum, for instance,with a solvent and heats the same, making it ready for use. Thedissolved gum is then transmitted through pipe or conduit 4'! to storingmixer 45. The gum mixture is kept in mixer 45 at a predeterminedtemperature (by any suitable heating means, not shown) and is thentransported through conduit 44 to the pan M in sufiicient quantityrequired for coating a certain length and width of tape. Pan 4| as wellas roller I6 and/r Il may also be heated by any appropriate heatingmeans (not shown).

The articles, for instance, collapsed boxes 50 of corrugated materialare stacked in container or hopper I and are conveyed therefrom overtransporting band 52 in the direction of arrow 53 to the upper portion33a of transporting band 33 and between rollers 30, 3|

The mechanisms for driving bands 52, 33 and 32 are well known in theart.

The collapsed box 50a is positioned partly on conveyer belt 52 andpartly on conveyer band 33a and is being pulled by rollers 30, 3|. TapeI2a having the adhesive coating in a liquid and preferably warm statethereon is being adhesively united to the corrugated box 50a at 5017 bycoaction of pressure rollers 30, 3|. After the tape has been united tothe box 50a substantially along the whole length of contiguous free endsto iClOSB said box, knife means or blades 28, 29 are put in operation byany known driving means, severing tape strip portion I2b from the tapel2a at a predetermined moment during the intermittent stopping of thedriving mechanism for conveyer belts 32, 33. After the cutting operationbox 58a continues in its movement between conveyer rollers 55, 55a. Asillustrated in the drawing, box 500 (a fragment thereof has only beenshown) is pressed and held with the applied tape strip I2c betweenrollers 55, 55a which also longitudinally transport the complete box inthe direction of arrow 56 to a desired place.

The boxes are continuously transported in collapsed condition onconveyer belt 52 and in spaced relation so that as the tap I2a is beingcut the preceding box will approach the conveyer belt portion 33a.

During the tape cutting operation the tape I2a received with a portionthereof by the box for nearly the whole length thereof is thus fixedthereon in position and held firmly, while blade 28 moves relatively toblade 29 for performing the cutting of said tape I 2a.

It is well understood that the arrangement herein described is driven byany suitable means and that the rollers and mandrel are mounted on aframe work as it is customary in the art.

Fig. 2 shows the collapsed box 500 with the tape strip I2c adhesivelyunited thereto along contiguous free edges 51, I8 thereof.

However, it is obvious that the process above disclosed may also be usedfor reinforcing contiguous portions or fold lines of boxes and the like.

From the foregoing description taken in connection with the accompanyingdrawing, the advantages of the means for carrying out the process andarticle derived therefrom will be readily understood by those skilled inthe art to which the invention pertains; and while I have outlined apreferred machine which I may consider to be the best embodimentthereof, I desire to have it understood that the means described ismerely illustrative and that such changes may be made as are within thescope of the appended claim.

Having .thus described the invention, what is claimed as new and desiredto be secured by Letters Patent, is:

In a machine for uniting a pair of contiguous free ends of a corrugatedbox in collapsed condition by means of a tape; means for continuouslyfeeding from a tape roll said tape to said free ends of said box, apressure device including a receptacle containing an adhesive in a warmstate, swingable pressure rollers engageable with said device andoppositely positioned thereto, said pressure rollers being adapted toselectively engage said tape at said pressure device whereby saidadhesive may be applied to a face of said tape, means for smoothing saidadhesive on said tape and for forwardly moving a portion of said tapeprovided with said adhesive to said ends for deposit thereon, and knifemeans for severing said portion from the remainder of said tape.

ALBERT J. GOLDSMITH.

